Mechanism for locking trolleys.



PATENTED FEB. 4, 1908.

E. Y. MOORE. MECHANISM FOR LOOKING TROLLBYS.

APPLICATION I'ILED AUG. 17, 1907.

2 SERIES-SHEET 1.

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E. Y. MOORE. MECHANISM FOR LOOKING TROLLEYS.

APPLIUATION FILED AUG. 17, 1907.

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PATENTED FEB. 4, 1908 2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EDWARD Y. MOORE, OF CLEVELAND, OHIO.

MECHANISM FOR LOCKING TROLLEYS.

Specification of Letters Patent.

Patented Feb. 4:, 1908.

Original application filed July 10. 1906 Serial No. 325.447. Divided andthis application filed August 17. 1907. Serial No. 389.042.

T 0 all whom it may concern:

Be it known that I, EDWARD Y. MOORE, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Mechanism for LookingTrolleys, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings.

This invention relates to load-supporting trolleys adapted for movementalong suitable trackways.

The object of the invention is to provide simple and effective means forlocking such trolley to its track. The trolley may be simply a movablesupporting device, or it may be associated with raising mechanism,constituting a hoist.

The invention comprises broadly a locking dog adapted to grip thetrackway, and an operating rock shaft having a cam connection therewith.

The construction and operation of this look is hereinafter more fullydescribed.

The drawings show my trolley lock combined with a suitable hoist, thecharacteristics of which are the subject matter of my application#325,447, of which this application is a division.

Figure 1 is a side elevation of a complete trolley hoist equipped. withmy lock. Fig. 2 is a longitudinal vertical section through the trolley.Fig. 3 is a cross section through the trolley on the line 33 of Fig. 2looking toward the right. Fig. at is a detail in horizontal sectionthrough the locking dogs, just above the rock shaft. As indicated by theline 4-4 of Fig. 3, Fig. 5 is a detail of horizontal section along theline of pivot shaft of the dogs, as indicated by line 55 of Fig. 3.

As shown in the drawings, the frame of the trolley comprises twocorresponding castings, each having a side plate 10, horizontal ofinwardly extending plates 11, and depending lugs 12 and 13. Throughthese lugs pass bolts 14 which secure the frame members together.Mounted in studs 15, carried by the plates 10, are the supporting wheels16 which are arranged to ride on the lower flange of an I beam 17 On theouter sides of the plates 10 are bosses 20 from which project studs (notshown) on which are journaled the elevating wheels 22. These wheels aresuitably geared with a driving shaft 23 (Fig. 2) extending crosswise ofthe frame beneath the I beam. This driving shaft carries a suitable handchain wheel 25. Fig. 1 shows an elevating cable 26, depending from thetwo lifting wheels 22 and passing beneath sheaves 29 of a suitablegrapple 27 and l thence upwardly across equalizing pulleys 28.

From the above description it will be apparent that there is provided atrolley adapted to travel on the lower flange of an I beam, this trolleyin the embodiment shown carrying suitable hoisting mechanism. Thishoisting mechanism is shown, described and claimed in my applicationreferred to. Whether the hoisting mechanism be used or not, it isdesired to be able to clamp the trolley at any point along the I beam.It is also desirable to have suitable handles at each end of the trolleyby which it may be drawn along. My locking mechanism, which is thesubject matter of this invention, provides such locks and handles. Thismechanism will now be described:

Extending crosswise of the trolley beneath the Lbeam, and mounted in theside plates 10, is a suitable rod or shaft 30. On this shaft arejournaled a pair of dogs 31 and 32. These dogs are provided near theirupper ends with hardened steel plugs 34, which are adapted to bearagainst the under surface of the I-beam. A spring 35 surrounds the shaft30 and gives the dogs a tendency to move so that their upper endsapproach each other, thus causing the plugs to bite the I- beam. Thisbiting becomes harder the more the hoist tends to move. The result isthat the hoist is normally locked to the I beam against movement ineither direction.

To release the dogs 31 and 32, I provide a shaft 40 which extendslongitudinally beneath the I-beam, being mounted in the lugs 12 and 13.This shaft carries a pair of cams 41 and 42, which are adapted to bearagainst rollers 37 on the dogs 31 and. 32 respectively. Handles on theend of the shaft 40 form means for rocking it, and when so rocked thecams engage the rollers and. swing the dogs so that the plugs 34 passaway from and out of contact with the I-beam, allowing the hoist to beshifted, as desired.

A spring 45 surrounding the rock shaft 40 and secured to it at one endand the other end to one of the lugs 12, normally holds the rock shaftin idle position, thus allowing the spring 35 to cause the dogs to bitethe I- beam. \Vhen either handle 44 is turned downwardly, against theaction of the spring Wheels carried thereby,

45, the dogs release the I-beam, and the hoist may be shifted. Thesehandles form also convenient means for shifting the hoist.

ley, a locking dog carried" thereby and adapt-v ed to engage thesupporting track for the trolley, a rock shaft, and a cam connectionbetween the rock shaft and dog.

' 2. The combination, with a trolley frame, of a rock shaft mountedtherein, a locking dog, and a cam and roller connection between the rockshaft and dog whereby the rocking of the shaft may operate the dog.

3. The combination of a trolley-having supporting wheels adapted totravel on the lower flange of an I-beam and, a locking dog carried bythe trolley and adapted to bite against the under side of the I-beamflange, and a cam adapted to move said dog.

4. The combination, with a frame having supporting wheels adapted totravel on the lower flange of an Ibeam, of a longitudinal rock shaftcarried by such frame beneath the I-beam, a locking dog adapted toengage the under side of the I-beam, and a cam connection between saiddog and rock shaft.

5. The combination of a trolley having a pair of side plates, supportingwheels carried on the inner side of saidside plates, a shaft connectingthe side plates, a locking dog pivotally mounted on said shaft, andmeans for operating the dog.

6. The combination of a trolley, a clamping lock therefor, a springtending to set said lock, and a movable cam operating mechanism mountedon the trolley and adapted to release said lock.

7. The combination of a trolley, a pair of locking dogs carried thereby,spring means tending to move said dogs into engagement with the trackwayfrom opposite directions, and means for moving the dogs out ofengagement.

8. The combination of a trolley adapted to ride on the lower flange ofan I-beam, a pair of dogs pivotally mounted in the trolley frame belowthe I-beam, and adapted to engage the under side of said flange, aspring connected with said dogs.

9. The combination of a frame, supporting a pair of clamping dogspivotally carried by the frame, a spring tending to move said dogs inone direction, a rock shaft carried by the frame, and a cam connectionbetween said rock shaft and dogs operating to move the dogs in thereleasing direction.

10. The combination, with a frame, of supporting wheels carrying thesame, a rock shaft carried by said frame, a locking dog,

ing the dogs out of engagement with the flange.

12. The combination of a trolley adapted to ride upon the lower flangeof an I-beam,

of a pair of dogs pivotally mounted in the trolley fi'ame and adapted toengage the I- beam from opposite directions, means tending to cause suchengagement, a rock shaft, and a cam connection between the rock shaftand dogs, whereby the rocking of the shaft swings the dogs out ofengagement.

13. The combination with a trolley frame, of supporting wheels carriedthereby and adapted to ride on the lower flange of an I- beam, a pair ofdogs mounted on said frame adapted to engage the underside of the I-beam, a spring adapted to swing said dogs toward the I-beam, a rockshaft mounted within the trolley fi'ame beneath the I-beam, and paralleltherewith, an operative connection between the rock shaft and dogs, and

means for rocking the rock shaft.

14. The combination with a trolley frame, of supporting wheels carriedthereby and adapted to ride on the lower flange of an I- beam, a crossshaft carried by the frame beneath such I-beam, a pair of dogs mountedon said shaft, and adapted to engage the underside of the I-beam fromopposite directions, a rock shaft mounted in the trolley frame beneaththe I-beam and parallel therewith, and a pair of cams on said rock shaftadapted to engage rollers on the two dogs respectively.

15. The combination of a frame, elevating mechanism carried thereby,supporting wheels carried by the frame and adapted to ride on the lowerflange of an I-beam, a longitudinal rock shaft supported in the framebeneath the I-beam, handles on the opposite ends of said rock shaft,whereby it may be rocked from either end, and a locking mechanismadapted to engage said I-beam' and operated by said rock shaft.

16., ,The combination with a frame, of supporting wheels carried therebyand adapted to ride on the lower flange of an I-beam, a cross shaftcarried by the frame beneath such I-beam, a pair of dogs mounted on saidshaft adapted to engage the under side of the I-beam, a spring securedat its ends to said dogs and adapted to swing them toward the on the twodogs respectively, a spring tending to hold said rock shaft in idleposition, and handles on opposite ends of the rock shaft for rocking it.

17. The combination of an Lbeam, a trolley adapted to travel thereon,means for normally locking the trolley against travel, and a handlesupported by the trolley frame and adapted to release the locking means.

18. The combination of a trolley having supporting wheels, alongitudinal rock shaft, clamping means operatable thereby, and handleson the opposite ends of the rock shaft.

19. The combination of a trolley adapted to travel on the lower flangeof an I-beam and having a frame extending beneath such I-beam, ofclamping means carried by the trolley frame, a longitudinal rock-shaftcarriedby the frame and means on said shaft it and serving also as aadapted to rock the frame may be drawn handle by which along itssupport.

20. The combination of a hoist adapted to travel, means for locking saidhoist against travel, and means on each end of the hoist for operatingthe locking means.

21. The combination of a hoist adapted to travel a longitudinal rockingshaft carried by the hoist, rocking means near the opposite ends of saidshaft, and means operated by said shaft for locking the hoist againsttravel.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

EDW'ARD Y. MOORE.

\Vitnesses ALBERT II. Barns, I J. B. HULL.

